Bobbin hanger for spinning machines

ABSTRACT

An improved bobbin hanger for supporting bobbins of various diameters, having a clutch mechanism to operate movable paws which engage the shoulders of the bobbin. A compression spring is also provided to control the speed of rotation of the bobbin.

United States Patent [72] Inventor KiyoshiNumata [50] Fieldo1'Search......

Toyonaka-shi, Osaka-in, Japan 795,989

[21] Appl. No. [22] Filed [56] References Cited UNITED STATES PATENTSFeb. 3, 1969 [45] Patented Feb. 23, 1971 [73] Assignee Naniwa MachineryIndustry Co., Ltd. P gg g ggg Osaka-Sm, Japan 8/1966 Whitehead, Sr. etal......

{2 Horny g Primary Examiner- Leonard D. Christian [31 Attorney-ArthurSchwartz [54] BOBBIN HANGER FOR SPINNING MAC 0 6 b w om bmb SCO m Umafin h O c c p o t 5 M thud mm a u.m.l ed v no m .mamP o .m.ma..m bmmwh n b m d -I. ,vhm om rmS awn .m mntm n -wS Awfwm hfi m C890 A R T mSST. Bmwm Abob 2.2 90 m3 S H E yzh m 45 2 H B m 8 .m f D 4 2 m m l 1 E CI Q I CS 0. 6U .m 1 2 1. 5 5 .l .l

speed of rotation of the bobbin.

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bar/171422 PATENTED FEB23 I97! SHEET 1 [IF 3 I NVENTQR N UMATA KIYOSHIATTORNEY PATENTED FEB23 l9?! SHEET. 3 OF 3 INVENTOR KIYOSHI NUMATA F/G.Z0 F/G. 21

' ATTORNEY BOBBIN HANGER FOR SPINNING MACHINES BACKGROUND OF THEINVENTION This invention relates to a bobbin hanger, More particularly,this invention relates to a bobbin hanger for a spinning machine,adapted to rotatably hang onto a hanging rail and permitting easyattachment and detachment of a bobbin.

The high-speed performance of recent spinning machines has, as a matterof course, greatly sped up the draw of string, sliber, thread, etc.,from the bobbins. The result is that the bobbin runs out of thread in avery short time. This necessitates frequent replacement of bobbins. Thishas necessitated a bobbin hanger which allows frequent replacement ofbobbins securely and with case.

In response to such requirements, many kinds of bobbin hangers have beendevised so far, among which the most popular type is provided with pawsrotatably pivoted in the lower part of a hanger body, which paws rest onthe shoulder of a bobbin to hook it. More specifically, a cylindricalshell of shell of a hanger body is of split construction, each matebeing provided with like cam grooves inside, along which a camshaftmoves up and dow with a pair of paws coupled in the lower end, whichcamshaft is movable in association with a handoperated slider fittedaround the shell, thereby causing the paws to spread and contract toengage and disengage the shoulder of a bobbin.

Alternatively, there is a bobbin hanger a having a pair of legs insertedinside a cylindrical shell of the body, said legs being provided with apaw at the top portion, which legs is slidable in association with themovement of a slider fitted around the shell, thereby causing the pairof legs to forcibly spread when the lowering-legs finally comes incontact with an appropriate inverse V'shaped means installed in thelower end of the shell, wherein the paws extending outside theshellengage the shoulders of a bobbin to hang on it.

However, such devices of the .prior art have many drawbacks anddisadvantages. The former is of split construction, and is fitted with acam, resulting in a complicated mechanism which requires an unattainabledegree of precision in production, many steps for assembly, highproduction costs, etc. The latter is required to have a long leg builtin a bobbin hanger body sufficient to reach the means for spreadingthem, and, therefore, the hanger as a whole tends to be weighty becauseof the metallic legs. And the means spreading the legs is so muchlimited in size that the spreading extent of the legs is very small,which makes it impossible to apply a hanger for a big bobbin.

This invention is similar to those conventional devices in that the pawsare pivotally mounted in the lower end of a hanger body in conjunctionwith the movement of a slider fitted around the body of a anger, so asto engage and disengage the shoulder of a bobbin. But this invention hasquite new constructual and operational features in respect to the paws.

OBJECTS OF THE INVENTION An object of this invention is to provide abobbin hanger which can easily and securely support bobbins of variousdiameters without any special skill.

Another object of this invention is to provide a bobbin hanger whichprotects the thread from tangles and breakage as it is withdrawn fromthe individual bobbin.

A further object of this invention is to provide a bobbin hanger whichautomatically controls a blind rotation of a hanger unsynchronous with adrawing speed of thread, so as to prevent possible tangles and breakagesof thread.

A still further object of this invention is to provide a bobbin hangerof simple internal construction, resulting in a simplified process ofassembly which leads tomass production with reduced unit costs.

A still further object of this invention is to provide a bobbin hangerrequiring no special working skill, making it easily handled by anyone.

SUMMARY OF THE INVENTION Briefly stated, a bobbin hanger of thisinvention consists essentially of a cup-shaped cover having a hangingrod adjustably screwed thereto, a cap body rotatably supported by saidhanging rod extending inside the cover, a hanger body received in thecap body, which hanger body has a fixed clutch and a movable clutchinstalled in a bore of the body, a vertical bar extending in a bore ofthe fixed clutch with a spring interposed therebetween, said movableclutch being raised up in association with the movement of a sliderfitted around the body when the latter is pushed upwardly by hand.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and other objects andadvantages of the invention will become apparent from the detaileddescription of a preferred embodiment thereof when read in conjunctionwith the drawings in which:

FIG. 1 shows an entire internal construction in section of the bobbinhanger.

FIG. 2 is a plan view.of the bobbin hanger illustrated in FIG. 1.

FIG. 3 is a view in section when a bobbin is hung onto the bobbinhanger.

FIG. 4 is a view in section when a bobbin is removed from the bobbinhanger with a slider pushed up, wherein the wings are completely housedin the body.

FIG. 5 is a view in section of the hanger body.

FIG. 6 is a plan view of the hanger body illustrated in FIG. 5.

FIG. 7 is a side view 0 the hanger body illustrated in FIG. 5.

FIG. 8 is a view in section taken on the line D-D' in FIG. 7.

FIG. 9 is a cross section taken on the line 8-8 in FIG. 8.

FIG. 10 is a cross section taken on the line C-C in F IG. 8.

FIG. 11 is a view in section of the cap body.

FIG. 12 is a cross section taken on the line A-A' in FIG. 11.

FIG. 13 is a plan view of the bearing case.

FIG. 14 is a fragmentary view partly in section of the bearing caseillustrated in FIG. 13.

FIG. 15 is a plan view of the fixed clutch.

FIG. 16 is a front view of the fixed clutch.

FIG. 17 is plan view of the movable clutch.

FIG. 18 is a front view of the movable clutch illustrated in FIG. 17.

FIG. 19 is a bottom view of the movable clutch illustrated in FIG. 17.

FIG. 20 is a front view of the vertical rod.

FIG. 21 is a right side view of the vertical rod.

FIG. 22 is a plan view of the vertical rod.

FIG. 23 is a plan view of the slider.

FIG. 24 is a front view of the slider illustrated in FIG. 23.

DETAILED DESCRIPTION OF THE BOBBIN HANGER A detailed explanation will begiven with reference to an example of embodiments constructed in aaccordance with this invention.

FIG. 4 shows a hanger body housing wings 47, 48 inside, and FIG. 3 showsa hanger body with a bobbin received in the lower end, with the wingsspreading, which wings will rest on the shoulders formed in the upperend portion of a bore of a bobbin to hold the bobbin therein.

FIG. 1 shows a vertical view in section when the wings are housed insidethe body.

A long hanger rail R of inverse U-shape in section has each hanger rod Ihung in the bottom opening, and fixed thereto by means ofa nut 2.

A cover 3 screwedto the hanger rod 1, made of synthetic thermoplasticmaterial, having a hole 4 at the top for inserting the hanger rod 1.Moreover, the cover 3 has a rounded groove 6 formed around the inside ofthe opened end 5 to be plugged with a bottom cover 8 having an inwardprojection 9, where a projection 7 is arranged so as to fit in therounded groove 6 to secure the bottom lid 8 to the cover 3.

The bottom lid 8 has a hole 10 drilled at the center, through which acap body 11 is inserted inwardly. The cap body 11 is made of syntheticthermoplastic material, whose section substantially takes a form ofinverse U-shape, with a flange 12 extruded around the upper end, theupper wall of which cap body is provided with a hole 14 to receive thelower portion of the hanger rod 1. The cap body 11 has the internal wallaxially depressed with lengthwise grooves 15 at not less than twoplaces, as shown in FIG. 11 and FIG. 12, having a bearing case 17therein, as shown in FIG. 13 and FIG. 14, with a projection 16 on itsouter face so as to fit in the groove 15.

The lower end of the hanger rod 1 is passed through the hole 14, whichlower end is projected downwards through a hole 18 centrally formed onthe bearing case 17 which is filled with a plurality of steel balls 19,added by a race 20 pressedly fitted thereto, ending with a cup-shapedstopper ring 22 fitted in the narrow part 21 of the hanger rod 1extending downwards from the race 20.

A cylindrical coiled spring 23 is interposed between the upper part ofthe bearing case 17 and the inner face of the cap body 11, while aconical coiled spring 24 is interposed between the under face of theflange 12 and the circumferential edge of the bottom lid 8.

The cap body 11 has a cylindrical body 26 passed through the bore 25,which body 26 has a fixed clutch 28, as shown in FIG. 14 and FIG. 15,attached in the upper part of the bore 27, the fixed clutch 28 beingcoupled to the cap body 11 by means of a pin 29. The body 26 has amovable clutch 32, as shown in FIG. 17 and FIG. 18, slidably fitted inthe bore 27 which clutch 32 has a plurality of tooth elements 31 to beengaged with tooth elements of the fixed clutch 28.

The movable clutch 32 has a plurality of toothed tails 33 spaced fromeach other, which space will be hereinafter referred to as space 34, asshown more clearly in FIG. 18.

Each toothed tail 33 is made narrower than width of the space 37 in abore 35 to permit their axial movement into the space, so that thetoothed tails 33 are capable of engaging with the teeth 36 on the innerface of the bore 35 whose inside diameter is smaller than that of thebore 27 of the body 26.

The fixed clutch 28 has a projection 38, shown in FIG. 15, at thecenter, and the movable clutch 32 has a depression 39, which depression39 has a hole 40 at the bottom. A vertical rod 42 having the upper endportion provided with a flange 41 is inserted into the hole 40 of themovable clutch 32, said projection 38 of the fixed clutch 28 and saiddepression 39 of the movable clutch 32 being associated by a cylindricalcoiled spring 43, which fixed clutch 28, movable clutch 32, and verticalrod 42 are all made of synthetic thermoplastic material by press-moldprocess. The vertical rod 42 has a slit 44 and 45 on each side of thelower end portion, as shown in FIGS. 20 and 21, with a bore 46traversely passed through the slits 44, 45, in which slits the ends ofwings 47, 48 are pivoted by means of a pin 51 through a bore 46 an andholes 49 and 50 in the wings 47, 48 so that the wings 47, 48 are coupledto the vertical rod 42.

A body 26 has a bar stopper 52 laterally fitted in the lower part, sothat the wings 47, 48 may stride over the bar stopper 52 when the wings47, 48 go down to come in contact with the bar stopper 52.

A body 26 has the outer face depressed with an axial lengthwise groovediagonally opposite to each other, along each extension of which grooveslengthwise hole is formed, respectively, in which holes the wings 47, 48are made to pivot in accordance with the movement of a vertical rod 42.

A metallic slider is slidably fitted around the body 26, which slider 60has projections 57, 58 as shown in FIGS. 23 and 24, in the inner face ofa bore 59. The slider 60 is handoperated to move up and down,accompanying a normal movement of the vertical rod 42 journaling thewings 47, 48 in a bore 61 drilled in the body 26.

The slider 60 can be fitted from the lower end of the body 26 when thewings 47, 48 are housed inside the body 26. The dot-dash lines 62 in theFIGS. show a portion of a bobbin wound with thread.

OPERATION OF THE BOBBIN HANGER The procedure for operation of attachingto and detaching from a bobbin hanger of this invention will be taken asfollows:

The bore of a bobbin 62 is inserted with the lower end of the body 26and with the wings 47, 48 completely housed in the lengthwise grooves55, 56, and, subsequently, he bobbin 62 is slid upwardly along the body26, in accordance with which the slider 60 is pushed up by hand, wherethe movable clutch 32 is caused to rise by means of the slider 60against a spring 43 force so as to move up toward the mated fixed clutchuntil both tooth elements of the clutches 28, 32 meet, wherein thepitched pitches of the V-shaped, tooth elements 31 of the movable clutch32 are made so as to be differentiated in relation with those of thefixed clutch 28 in such a way as to cause a slight angular displacementof the movable clutch 32, thereby bringing the toothed tails 33 of themovable clutch 32 out of engagement with the teeth 36 in a bore 35 ofthe body 26, and, simultaneously, ending in a fit in spaces 37 in thebore 35. This enables the movable clutch 32 to further move down byreason of the force exerted by spring 43 until the toothed tails 33 stopin contact with the bottom of the bore 35, in accordance with which thevertical rod 42 received in the bore 39 of the movable clutch 32 iscaused to cowork to change the position from that in FIG. 4 to that inFIG. 3.

As a result, the wings 47, 48 come to stride over a bar stopper 52transversely extending in the lower end of the body 26, resulting in thespread of the wings sufficiently to extrude through the lengthwisegrooves 55, 56 until the wings 47, 48 rest on the shoulders of a bobbin.The vertical rod 42 once lowered continues to be withheld by a spring 43force unless the slider 60 is moved up again.

On the contrary, when an empty bobbin is removed from the hanger toreplace it with a full-bobbin, the steps for operation will be taken asfollows:

The movable clutch 32 is pushed toward the fixed clutch 28 until thetooth elements 31 of both clutches come in engagement with each other.

When the slider 60 is pushed up by hand, the movable clutch 32 is movedtoward the fixed clutch 28 against a spring 43 force in the body 26,and, then, the tooth elements 31 are engaged with the mated toothelements 30 of the fixed clutch 28, where the movable clutch 32 is forceto rotate circumferentially in the clockwise direction, owing to thearranged differential pitches, enabling the toothed tails 33 of themovable clutch 32 to gear with the teeth 36 in a drill 35 of the body26, which prevents a return of the movable clutch 32 to the originalposition, followed by an upward shift of the vertical rod 42. Thus, thevertical rod 42 workable in association with the movable clutch 32 ismoved upwardly along the body 26, so that the wings 47, 48 are raised upuntil they disappear through the lengthwise grooves 55, 56 into the body26, so that the shoulders of the bobbin 62 comes out of engagement withthe wings 47, 48 to permit withdrawal of the bobbin 62.

Subsequently, the operation of controlling the velocity of drawingthread from a suspending bobbin is as follows:

Normally, the velocity of rotation of a bobbin is proportional to thatof drawing thread from a bobbin, but the rotation of a bobbin tends toaccelerate gradually, finally overcoming the sped speed of drawingthread, causing tangle-ups on the bobbin and breakage of thread.

Such events owing to different speeds tend to happen more frequently asa bobbin is accelerated with decreasing thread on the bobbin.

To solve this problem, a bobbin hanger constructed in accordance withthis invention is provided with a compression spring aimed atcontrolling the speed of rotation of a bobbin, which spring is installedbetween cover 3 and cap body 11, assisted by a cylindrical coiled spring23 between cap body 11 and bearing case 17 which spring is expansible inaccordance with the decreasing weight of a bobbin. For example, when abobbin is so heavy with much thread, a cylindrical coiled spring 23 anda conical coiled spring 24 are forcibly compressed, thereby putting agreat brake on the body 26 carrying a bobbin to retard the rotation as awhole hanger. On the contrary, when a bobbin is light with thread,almost emptied, the springs 23, 24 naturally return to put reduced brakeon the bobbin rotation, resulting in a reduction of unnecessary sur plustension onthe thread. The cylindrical coiled spring 23 and the conicalcoiled spring 24 are required to be adjusted for any weight of a bobbin,which weight depends upon the size of a bobbin, by fastening orunfastening a nut 63 screwed on the hanger rod 1. The same procedure sis needed in accordance with strength of thread to be wound to eliminatepossible breakages of thread, and produce the most appropriate brake ona bobbin. 1 v

An example of embodiments" constructed in accordance with this inventionhas such structural features as have been hitherto described, and anyoneskilled in the art would understand easily and clearly that a bobbin canbe attached to and detached from a bobbin hanger of this invention bypushing up the slider fitted around the body, and that the bobbin hangerprovided by this n invention has quite unobvious internal structuralfeatures in view'ofthe prior art, which are materialized into theadopted clutch mechanism wherein one of the mated clutches is slidablyarranged in a bore of the body, coupled to a vertical rod joumaling thewings which can pivot in a lower end portion of the body to hold theshoulders of the bobbin.

Thus, a bobbin can be hung onto and withdrawn from a bobbin hanger justby sliding a slider on the hanger body, permitting facilitated andquickened performance of bobbin hanging. Secondly, a bobbin hangerisapplicable for bobbins of any size, where thesecuring of a bobbin isso firm that although a force unexpectedly exerts on the bobbins, theyare quite free from detachment from the. hanger. Thirdly, the thread isalways drawn from a bobbin under constant tension whatever the bobbinmay be fully charged or not by means of the two braking springs housedbetween coverand cap body,

which springs are appropriately adjusted by means of a nut screwed onthe hanger rod in accordance with the strength of thread and the desiredspeed of drawing, thereby producing a' desirable braking force onbobbins. injrotation. Fourthly, the operation of braking serves toprevent tangle-up, breakage, damages, of thread drawnfrom .a bobbin.

lclaim: i g l. A bobbin hanger for a spinning machine comprising: a. aunitary body having abore therein, b. a clutch fixedly attached to theupper portion bore, c. a second clutch slidably fitted. in the lowerportion of said bore, l d. said first and second clutches having aplurality of tooth elements, e. said second clutch having toothed tails,f. said tooth elements operative to cause a slight angular displacementof said second clutch, g. a sliding vertical rod passing through saidhanger body, h. said rod carrying a pair of movable wings, i. said bodyhaving a pair of slots through which said wings may extend, V

of said j. a stopper bar for spreading said' wings upon downward vmovement of said rod.

2. A bobbin hanger for a spinning machine comprising:

a. a body having a bore therein, 1

b. a clutch fixedly attached to the upper portion of said bore,

c. a second clutch slidably fitted in the lower portion of said bore, a

d. said first and a second clutches having a plurality of toothelements,

e. said second clutch having toothed-tails,

f. said tooth elements operative to cause a slight angular displacementof said second clutch,

g. a sliding vertical rod passing through said hanger body,

h. said rod carrying a pair of movable wings,

i. said body having a pair of slots through which said wings may extend,

j. a stopper bar for spreading said wings upon downward movement of saidrod,

k. said hanger body has teeth in said lower body portion of said bore,

1. said angular displacement of said second clutch causes disengagementof said tooth tails from said teeth in said lower portion of said bore.

3. A bobbin hanger as set forth in claim 2 further comprising:

a. a flange on said rod,

b. a spring means between said flange and said first clutch for applyinga force to said rod.

4. A bobbin hanger as set forth in claim 3 further comprising:

a. a pair of grooves in said body,

b. a slider slidably fitted around said body for actuating said bobbinhanger.

5. A speed controlling device for a spinning bobbin hanger comprising:

a. a body portion containing bobbin holding means,

b. said body portion having a bearing case housing steel balls and arace,

c. a hanging rod,

d. said hanging rod being rotatably journaled by said bearing a case,

e. a cap on said body portion,

f. a cover through which said hanging rod extends,

g. said cover having a bottom lid secured thereto and slidably abuttingsaid body cap, 4 h. spring means between said bearing case and said bodycap,

i. second spring means between said body cap and said bottom lid,

j. said second spring compensating for variation in rotating speed as aresult of decreased bobbin weight,

k.said cover being adjustable in accordance with strength of the thread.J t

6. A bobbin hanger for a spinning machine comprising:

a. a body having a bore therein,

b. a clutch fixedly attached to the upper portion of said bore,

c. a second clutch slidably fitted in the lower portion of said bore,

d. said first and second clutches having a plurality of tooth elements,

e. said second clutch having toothed tails,

f. said tooth elements operative to cause a slight angular displacementof said second clutch,

g. a sliding vertical rod passing through said hanger body,

h. said rod carrying a pair of movable wings,

i. said body having a pair of slots through which said wings may extend,v

j. a stopper bar for spreading said wings upon downward movement of saidrod,

k. a hanging rod journaled by a balls and a race,

l. a body cap on the top of said body,

in. a cover,

n. said cover having a bottom lid through which said body extends,

0. spring means between said bottom lid and said body cap,

p. second spring means between said bearing case housing and said bodycap.

bearing case housing steel

1. A bobbin hanger for a spinning machine comprising: a. a unitary bodyhaving a bore therein, b. a clutch fixedly attached to the upper portionof said bore, c. a second clutch slidably fitted in the lower portion ofsaid bore, d. said first and second clutches having a plurality of toothelements, e. said second clutch having toothed tails, f. said toothelements operative to cause a slight angular displacement of said secondclutch, g. a sliding vertical rod passing through said hanger body, h.said rod carrying a pair of movable wings, i. said body having a pair ofslots through which said wings may extend, j. a stopper bar forspreading said wings upon downward movement of said rod.
 2. A bobbinhanger for a spinning machine comprising: a. a body having a boretherein, b. a clutch fixedly attached to the upper portion of said bore,c. a second clutch slidably fitted in the lower portion of said bore, d.said first and a second clutches having a plurality of tooth elements,e. said second clutch having toothed tails, f. said tooth elementsoperative to cause a slight angular displacement of said second clutch,g. a sliding vertical rod passing through said hanger body, h. said rodcarrying a pair of movable wings, i. said body having a pair of slotsthrough which said wings may extend, j. a stopper bar for spreading saidwings upon downward movement of said rod, k. said hanger body has teethin said lower body portion of said bore, l. said angular displacement ofsaid second clutch causes disengagement of said tooth tails from saidteeth in said lower portion of said bore.
 3. A bobbin hanger as setforth in claim 2 further comprising: a. a flange on said rod, b. aspring means between said flange and said first clutch for applying aforce to said rod.
 4. A bobbin hanger as set forth in claim 3 furthercomprising: a. a pair of grooves in said body, b. a slider slidablyfitted around said body for actuating said bobbin hanger.
 5. A speedcontrolling device for a spinning bobbin hanger comprising: a. a bodyportion containing bobbin holding means, b. said body portion having abearing case housing steel balls and a race, c. a hanging rod, d. saidhanging rod being rotatably journaled by said bearing a case, e. a capon said body portion, f. a cover through which said hanging rod extends,g. said cover having a bottom lid secured thereto and slidably abuttingsaid body cap, h. spring means between said bearing case and said bodycap, i. second spring means between said body cap and said bottom lid,j. said second spring compensating for variation in rotating speed as aresult of decreased bobbin weight, k. said cover being adjustable inaccordance with strength of the thread.
 6. A bobbin hanger for aspinning machine comprising: a. a body having a bore therein, b. aclutch fixedly attached to the upper portion of said bore, c. a secondclutch slidably fitted in the lower portion of said bore, d. said firstand second clutches having a plurality of tooth elements, e. said secondclutch having toothed tails, f. said tooth elements operative to cause aslight angular displacement of said second clutch, g. a sliding verticalrod passing through said hanger body, h. said rod carrying a pair ofmovable wings, i. said body having a pair of slots through which saidwings may extend, j. a stopper bar for spreading said wings upondownward movement of said rod, k. a hanging rod journaled by a bearingcase housing steel balls and a race, l. a body cap on the top of saidbody, m. a cover, n. said cover having a bottom lid through which saidbody extends, o. spring means between said bottom lid and said body cap,p. second spring means between said bearing case housing and said bodycap.